Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Classical T Tauri stars"'
Autor:
C. C. Espaillat, T. Thanathibodee, Z. Zhu, I. Rabago, J. Wendeborn, N. Calvet, L. Zamudio-Ruvalcaba, M. Volz, C. Pittman, M. McClure, J. F. Babb, R. Franco-Hernández, E. Macías, M. Reynolds, P.-G. Yan
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 1, p L16 (2024)
Here we report the detection of dust depletion in a misaligned inner disk around UX Tau A using JWST MIRI spectra. Mid-infrared (MIR) continuum “seesaw” variability was detected in this disk by Spitzer and attributed to variable shadows cast on t
Externí odkaz:
https://doaj.org/article/58219e8a61924d2bb5e61234598512a6
Autor:
John Wendeborn, Catherine C. Espaillat, Thanawuth Thanathibodee, Connor E. Robinson, Caeley V. Pittman, Nuria Calvet, Ágnes Kóspál, Konstantin N. Grankin, Fredrick M. Walter, Zhen Guo, Jochen Eislöffel
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 96 (2024)
Classical T Tauri stars (CTTSs) are young, low-mass stars that accrete material from their surrounding protoplanetary disk. To better understand accretion variability, we conducted a multiepoch, multiwavelength photometric monitoring campaign of four
Externí odkaz:
https://doaj.org/article/67c999fca97744559398fa387b042f73
Autor:
Javier Serna, Giovanni Pinzón, Jesús Hernández, Ezequiel Manzo-Martínez, Karina Mauco, Carlos G. Román-Zúñiga, Nuria Calvet, Cesar Briceño, Ricardo López-Valdivia, Marina Kounkel, Guy S. Stringfellow, Keivan G. Stassun, Marc Pinsonneault, Lucia Adame, Lyra Cao, Kevin Covey, Amelia Bayo, Alexandre Roman-Lopes, Christian Nitschelm, Richard R. Lane
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 68 (2024)
We developed a grid of stellar rotation models for low-mass and solar-type classical T Tauri stars (CTTS; 0.3 M _⊙ < M _* < 1.2 M _⊙ ). These models incorporate the star–disk interaction and magnetospheric ejections to investigate the evolution
Externí odkaz:
https://doaj.org/article/3f2ebec67a004852aaa455cd3837a8a2
Autor:
Carlos E. Romero-Mirza, Karin I. Öberg, Andrea Banzatti, Klaus M. Pontoppidan, Sean M. Andrews, David J. Wilner, Edwin A. Bergin, Ian Czekala, Charles J. Law, Colette Salyk, Richard Teague, Chunhua Qi, Jennifer B. Bergner, Jane Huang, Catherine Walsh, Viviana V. Guzmán, L. Ilsedore Cleeves, Yuri Aikawa, Jaehan Bae, Alice S. Booth, Gianni Cataldi, John D. Ilee, Romane Le Gal, Feng Long, Ryan A. Loomis, François Menard, Yao Liu
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 36 (2024)
We present MIRI Medium-resolution Spectrograph observations of the large, multi-gapped protoplanetary disk around the T Tauri star AS 209. The observations reveal hundreds of water vapor lines from 4.9–25.5 μ m toward the inner ∼1 au in the disk
Externí odkaz:
https://doaj.org/article/9220f739430b4e5eb0ee6051337d1018
Autor:
Andrea Banzatti, Klaus M. Pontoppidan, John S. Carr, Evan Jellison, Ilaria Pascucci, Joan R. Najita, Carlos E. Muñoz-Romero, Karin I. Öberg, Anusha Kalyaan, Paola Pinilla, Sebastiaan Krijt, Feng Long, Michiel Lambrechts, Giovanni Rosotti, Gregory J. Herczeg, Colette Salyk, Ke Zhang, Edwin A. Bergin, Nicholas P. Ballering, Michael R. Meyer, Simon Bruderer, The JDISCS Collaboration
Publikováno v:
The Astrophysical Journal Letters, Vol 957, Iss 2, p L22 (2023)
Previous analyses of mid-infrared water spectra from young protoplanetary disks observed with the Spitzer-IRS found an anticorrelation between water luminosity and the millimeter dust disk radius observed with ALMA. This trend was suggested to be evi
Externí odkaz:
https://doaj.org/article/d8affe53ce974ba98c7961ca36da0b0c
Publikováno v:
The Astrophysical Journal Letters, Vol 955, Iss 1, p L11 (2023)
Theoretical models indicate that photoevaporative and magnetothermal winds play a crucial role in the evolution and dispersal of protoplanetary disks and affect the formation of planetary systems. However, it is still unclear what wind-driving mechan
Externí odkaz:
https://doaj.org/article/04857d02ce584caf93b00bc0a37861a9
Autor:
S. K. Betti, K. B. Follette, K. Ward-Duong, A. E. Peck, Y. Aoyama, J. Bary, B. Dacus, S. Edwards, G.-D. Marleau, K. Mohamed, J. Palmo, C. Plunkett, C. Robinson, H. Wang
Publikováno v:
The Astronomical Journal, Vol 166, Iss 6, p 262 (2023)
Accretion rates ( $\dot{M}$ ) of young stars show a strong correlation with object mass ( M ); however, extension of the $\dot{M}\mbox{--}M$ relation into the substellar regime is less certain. Here, we present the Comprehensive Archive of Substellar
Externí odkaz:
https://doaj.org/article/ecc491a632e548f9a84b7edc8dfd4b4a
Autor:
Mu-Tian Wang, Gregory J. Herczeg, Hui-Gen Liu, Min Fang, Doug Johnstone, Ho-Gyu Lee, Frederick M. Walter, Franz-Josef Hambsch, Carlos Contreras Peña, Jeong-Eun Lee, Mervyn Millward, Andrew Pearce, Berto Monard, Lihang Zhou
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 2, p 113 (2023)
EX Lup is the archetype for the class of young stars that undergoes repeated accretion outbursts of ∼5 mag at optical wavelengths that last for months. Despite extensive monitoring that dates back 130 yr, the accretion history of EX Lup remains mos
Externí odkaz:
https://doaj.org/article/67ed1f34b52142599ef211c9caed81e2
Autor:
Gregory J. Herczeg, Yuguang Chen, Jean-Francois Donati, Andrea K. Dupree, Frederick M. Walter, Lynne A. Hillenbrand, Christopher M. Johns-Krull, Carlo F. Manara, Hans Moritz Günther, Min Fang, P. Christian Schneider, Jeff A. Valenti, Silvia H. P. Alencar, Laura Venuti, Juan Manuel Alcalá, Antonio Frasca, Nicole Arulanantham, Jeffrey L. Linsky, Jerome Bouvier, Nancy S. Brickhouse, Nuria Calvet, Catherine C. Espaillat, Justyn Campbell-White, John M. Carpenter, Seok-Jun Chang, Kelle L. Cruz, S. E. Dahm, Jochen Eislöffel, Suzan Edwards, William J. Fischer, Zhen Guo, Thomas Henning, Tao Ji, Jessy Jose, Joel H. Kastner, Ralf Launhardt, David A. Principe, Connor E. Robinson, Javier Serna, Michal Siwak, Michael F. Sterzik, Shinsuke Takasao
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 102 (2023)
Accretion plays a central role in the physics that governs the evolution and dispersal of protoplanetary disks. The primary goal of this paper is to analyze the stability over time of the mass accretion rate onto TW Hya, the nearest accreting solar-m
Externí odkaz:
https://doaj.org/article/ce42b0d00dc5441485186ec510cbe7cf
Autor:
Justyn Campbell-White, Carlo F. Manara, Myriam Benisty, Antonella Natta, Rik A. B. Claes, Antonio Frasca, Jaehan Bae, Stefano Facchini, Andrea Isella, Laura Pérez, Paola Pinilla, Aurora Sicilia-Aguilar, Richard Teague
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 1, p 25 (2023)
PDS 70 is so far the only young disk where multiple planets have been detected by direct imaging. The disk has a large cavity when seen at submillimeter and near-infrared wavelengths, which hosts two massive planets. This makes PDS 70 the ideal targe
Externí odkaz:
https://doaj.org/article/58dafa2549024cab87a6b9d074e87621